package task3_13;

/**
 * Create by IntelliJ IDEA
 *
 * @author: banana
 * @date-Time: 2018/4/13 8:20
 * @description:图形类，抽象类：3个抽象类
 */
public abstract class Shape {
  public abstract double area();
  public abstract String getName();
  public abstract void output();



}
